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如何將JSON從服務器發送到EJS文件並進行解析？

[英]How do you send JSON from the server to an EJS file and parse it?

 原文  2013-11-29 16:57:19  9   1    json/ node.js/ validation/ express/ ejs

問題描述

我在Node.js / Express應用程序中添加了一個Web表單，並嘗試為其設置驗證和清理功能，但是我遇到了解析問題。 我正在使用Express-Validator中間件和Node-Validator模塊進行驗證和清理。 到目前為止，看來我已正確安裝了它們，並且還能夠輸出要在模板上解析的JSON的字符串化版本。

這是我的代碼：

Server.js 

var express          = require ('express'), 
    organization     = require('./routes/organizations'),
    expressValidator = require('express-validator'),
    check            = require('validator').check,
    sanitize         = require('validator').sanitize, 
    Validator = require('validator').Validator;

var app = express();

app.configure(function () {
  app.use(express.logger('dev')); /* 'default', 'short', 'tiny', 'dev' */
  app.use('/css', express.static(__dirname + '/public/css'));
  app.use('/js', express.static(__dirname + '/public/js'));
  app.use('/views', express.static(__dirname + '/public/views'));
  app.use(express.bodyParser());
    app.use(express.cookieParser());
    app.use(express.bodyParser());
    app.use(express.methodOverride());
    app.use(express.session({ secret: 'keyboard cat' }));
    app.set('view engine', 'ejs');
    app.use(expressValidator());
    app.use(app.router);
});


app.set('views', __dirname + '/public/views');

app.get('/', function(req, res){
  res.render('index');
});


app.get('/submit-organization', function(req, res){
  res.render('submit-organization', { 
            title: 'Form Validation Example is currently Valid',
            message: '',
            errors: ''
        });
});

//Post
app.post('/submit-organization', function(req,res){

    /**
    req.onValidationError(function (msg) {
        var errors = req.validationErrors();
        var mappedErrors = req.validationErrors(true);
        console.log("errors are: " + mappedErrors);
        res.render('submit-organization',{errors: msg});
    });

    req.check('name', 'Name is required').notEmpty();   
    req.check('description', 'A description is required').notEmpty();        
    **/

    req.assert('name', 'Name is required').notEmpty();   
    req.assert('description', 'A description is required').notEmpty();     

    var errors = req.validationErrors();
    var mappedErrors = req.validationErrors(true);

    //console.log(mappedErrors);
    res.render('submit-organization',{errors: mappedErrors});     





});

app.listen(3002);
console.log('Listening on port 3002...');

提交- organization.js 

<% include header %>
<div class="pure-u-1">
    <div style="color:red">
            <%- JSON.stringify(errors.name) %>
    </div>
    <form action="/submit-organization" method="post"  class="pure-form pure-form-stacked">
        <fieldset>
            <legend>Submit Organization</legend>

            <p>An organization can be anything from a club to that running group you might be in</p>

            <div class="control-group">
                <label for="name">Name</label>
                <input id="name" type="text" name="name" placeholder="My Organizaton Name">
            </div>

            <div class="control-group">
                <label for="category">Category</label>
                <select id="category" name="category">
                    <option>category 1</option>
                    <option>category 2</option>
                    <option>category 3</option>
                </select>
            </div>

            <div class="control-group">
                <label for="keywords">Keywords</label>
                <input id="keywords" type="text" name="keywords" placeholder="running, excerise, beer, blah">
            </div>

            <div class="control-group">
                <label for="website">Website</label>
                <input id="website" type="text" name="website" placeholder="www.example.com">
            </div>

            <div class="control-group">
                <label for="description">Description</label>
                <textarea id="description" name="description" style="width:400px;height:100px;"></textarea>
            </div>

            <div id="meeting-times">

                <h4>When</h4> 


                <div class="inline-block">
                    <div class="day"><label>Monday</label></div>
                    <label>@</label> 
                    <input id="monday-venue" type="text" name="monday_venue" placeholder="Some Place"> 
                    <input id="monday-starttime" class="time" type="text" name="monday_starttime" placeholder="8:00 AM"> <label>-</label>
                    <input id="monday-endtime" class="time" type="text" name="monday_endtime" placeholder="9:00 AM">
                </div>

                <div class="inline-block">
                    <div class="day"><label>Tuesday</label></div>
                    <label>@</label> 
                    <input id="tuesday-venue" type="text" name="tuesday_venue" placeholder="Some Place"> 
                    <input id="tuesday-starttime" class="time" type="text" name="tuesday_starttime" placeholder="8:00 AM"> <label>-</label>
                    <input id="tuesday-endtime" class="time" type="text" name="tuesday_endtime" placeholder="9:00 AM">
                </div>

                <div class="inline-block">
                    <div class="day"><label>Wednesday</label></div>
                    <label>@</label> 
                    <input id="wednesday-venue" type="text" name="wednesday_venue" placeholder="Some Place"> 
                    <input id="wednesday-starttime" class="time" type="text" name="wednesday_starttime" placeholder="8:00 AM"> <label>-</label>
                    <input id="wednesday-endtime" class="time" type="text" name="wednesday_endtime" placeholder="9:00 AM">
                </div>

                <div class="inline-block">
                    <div class="day"><label>Thursday</label></div>
                    <label>@</label> 
                    <input id="thursday-venue" type="text" name="thursday_venue" placeholder="Some Place"> 
                    <input id="thursday-starttime" class="time" type="text" name="thursday_starttime" placeholder="8:00 AM"> <label>-</label>
                    <input id="thursday-endtime" class="time" type="text" name="thursday_endtime" placeholder="9:00 AM">
                </div>

                <div class="inline-block">
                    <div class="day"><label>Friday</label></div>
                    <label>@</label> 
                    <input id="friday-venue" type="text" name="friday_venue" placeholder="Some Place"> 
                    <input id="friday-starttime" class="time" type="text" name="friday_starttime" placeholder="8:00 AM"> <label>-</label>
                    <input id="friday-endtime" class="time" type="text" name="friday_endtime" placeholder="9:00 AM">
                </div>


                <div class="inline-block">
                    <div class="day"><label>Saturday</label></div>
                    <label>@</label> 
                    <input id="saturday-venue" type="text" name="saturday_venue" placeholder="Some Place"> 
                    <input id="saturday-starttime" class="time" type="text" name="saturday_starttime" placeholder="8:00 AM"> <label>-</label>
                    <input id="saturday-endtime" class="time" type="text" name="saturday_endtime" placeholder="9:00 AM">
                </div>

                <div class="inline-block">
                    <div class="day"><label>Sunday</label></div>
                    <label>@</label> 
                    <input id="sunday-venue" type="text" name="sunday_venue" placeholder="Some Place"> 
                    <input id="sunday-starttime" class="time" type="text" name="sunday_starttime" placeholder="8:00 AM"> <label>-</label>
                    <input id="sunday-endtime" class="time"type="text" name="sunday_endtime" placeholder="9:00 AM">
                </div>

            </div>

            <button type="submit" class="pure-button pure-button-primary">Post</button>

        </fieldset>
    </form>
</div>
<% include footer %>

* 在上面的文件中，我得到了以下錯誤之一的JSON：* 

<%- JSON.stringify(errors.name) %>

輸出驗證錯誤之一的JSON，看起來像這樣： 

{"param":"name","msg":"Name is required","value":""}

但是，我只想在模板上顯示“ msg”對象，但是當我使用如下代碼時卻收到TypeError ： 

<%- JSON.stringify(errors.name.msg) %>

讓我知道這是否足夠的信息，或者你們是否需要我在這里想要完成的更多詳細信息。

  • 史蒂夫

1 個解決方案

解決方案1
 0  2013-11-30 23:49:52

@robertklep，

正在填充。 感謝您的幫助，但我終於明白了。 我一直認為這是錯誤的，因為我認為我可以在EJS模板中編寫代碼以遍歷映射的錯誤。 而不是編寫此代碼（我認為不可能，因為我嘗試了我能想到的所有事情），我為server.js文件中的每個驗證錯誤創建了一個變量，然后通過JSON將其傳遞給我的EJS模板。 如果有人感興趣，這是我的最終代碼：

server.js 

var express          = require ('express'),
    dbConnection = require('./models/dbConnection'), 
    organization                 = require('./routes/organizations'),
    home                         = require('./routes/home'),
    expressValidator             = require('express-validator'),
    check                        = require('validator').check,
    sanitize                     = require('validator').sanitize, 
    Validator                    = require('validator').Validator;

var app = express();

app.configure(function () {
  app.use(express.logger('dev')); /* 'default', 'short', 'tiny', 'dev' */
  app.use('/css', express.static(__dirname + '/public/css'));
  app.use('/js', express.static(__dirname + '/public/js'));
  app.use('/views', express.static(__dirname + '/public/views'));
  app.use(express.bodyParser());
    app.use(express.cookieParser());
    app.use(express.bodyParser());
    app.use(express.methodOverride());
    app.use(express.session({ secret: 'keyboard cat' }));
    app.set('view engine', 'ejs');
    app.use(expressValidator());
    app.use(app.router);
});


app.set('views', __dirname + '/public/views');


app.get('/',home.getOrganizations);


app.get('/submit-organization', function(req, res){
  res.render('submit-organization', { 
            title: 'Form Validation Example is currently Valid',
            message: '',
            errors: ''
        });
});

//Post
app.post('/submit-organization', function(req,res){

    req.assert('name', 'Name is required').notEmpty();   
    req.assert('description', 'A description is required').notEmpty();     


    var errors = req.validationErrors();
    var mappedErrors = req.validationErrors(true);

    var myerror1 = mappedErrors.name.msg;
    var myerror2 = mappedErrors.description.msg;
    res.render('submit-organization',{errors: {error1: myerror1, error2: myerror2}});     

});

app.listen(3002);
console.log('Listening on port 3002...');

Submit-organizations.ejs（對不起，我在最初的問題中錯誤地寫了“ submit-organizations.js”）： 

<% include header %>
<div class="pure-u-1">
    <div style="color:red">
        <ul>
            <li><%- JSON.stringify(errors.error1) %></li>
            <li><%- JSON.stringify(errors.error2) %></li>
        </ul>
    </div>
    <form action="/submit-organization" method="post"  class="pure-form pure-form-stacked">
        <fieldset>
            <legend>Submit Organization</legend>

            <p>An organization can be anything from a club to that running group you might be in</p>

            <div class="control-group">
                <label for="name">Name</label>
                <input id="name" type="text" name="name" placeholder="My Organizaton Name">
            </div>

            <div class="control-group">
                <label for="category">Category</label>
                <select id="category" name="category">
                    <option>category 1</option>
                    <option>category 2</option>
                    <option>category 3</option>
                </select>
            </div>

            <div class="control-group">
                <label for="keywords">Keywords</label>
                <input id="keywords" type="text" name="keywords" placeholder="running, excerise, beer, blah">
            </div>

            <div class="control-group">
                <label for="website">Website</label>
                <input id="website" type="text" name="website" placeholder="www.example.com">
            </div>

            <div class="control-group">
                <label for="description">Description</label>
                <textarea id="description" name="description" style="width:400px;height:100px;"></textarea>
            </div>

            <div id="meeting-times">

                <h4>When</h4> 


                <div class="inline-block">
                    <div class="day"><label>Monday</label></div>
                    <label>@</label> 
                    <input id="monday-venue" type="text" name="monday_venue" placeholder="Some Place"> 
                    <input id="monday-starttime" class="time" type="text" name="monday_starttime" placeholder="8:00 AM"> <label>-</label>
                    <input id="monday-endtime" class="time" type="text" name="monday_endtime" placeholder="9:00 AM">
                </div>

                <div class="inline-block">
                    <div class="day"><label>Tuesday</label></div>
                    <label>@</label> 
                    <input id="tuesday-venue" type="text" name="tuesday_venue" placeholder="Some Place"> 
                    <input id="tuesday-starttime" class="time" type="text" name="tuesday_starttime" placeholder="8:00 AM"> <label>-</label>
                    <input id="tuesday-endtime" class="time" type="text" name="tuesday_endtime" placeholder="9:00 AM">
                </div>

                <div class="inline-block">
                    <div class="day"><label>Wednesday</label></div>
                    <label>@</label> 
                    <input id="wednesday-venue" type="text" name="wednesday_venue" placeholder="Some Place"> 
                    <input id="wednesday-starttime" class="time" type="text" name="wednesday_starttime" placeholder="8:00 AM"> <label>-</label>
                    <input id="wednesday-endtime" class="time" type="text" name="wednesday_endtime" placeholder="9:00 AM">
                </div>

                <div class="inline-block">
                    <div class="day"><label>Thursday</label></div>
                    <label>@</label> 
                    <input id="thursday-venue" type="text" name="thursday_venue" placeholder="Some Place"> 
                    <input id="thursday-starttime" class="time" type="text" name="thursday_starttime" placeholder="8:00 AM"> <label>-</label>
                    <input id="thursday-endtime" class="time" type="text" name="thursday_endtime" placeholder="9:00 AM">
                </div>

                <div class="inline-block">
                    <div class="day"><label>Friday</label></div>
                    <label>@</label> 
                    <input id="friday-venue" type="text" name="friday_venue" placeholder="Some Place"> 
                    <input id="friday-starttime" class="time" type="text" name="friday_starttime" placeholder="8:00 AM"> <label>-</label>
                    <input id="friday-endtime" class="time" type="text" name="friday_endtime" placeholder="9:00 AM">
                </div>


                <div class="inline-block">
                    <div class="day"><label>Saturday</label></div>
                    <label>@</label> 
                    <input id="saturday-venue" type="text" name="saturday_venue" placeholder="Some Place"> 
                    <input id="saturday-starttime" class="time" type="text" name="saturday_starttime" placeholder="8:00 AM"> <label>-</label>
                    <input id="saturday-endtime" class="time" type="text" name="saturday_endtime" placeholder="9:00 AM">
                </div>

                <div class="inline-block">
                    <div class="day"><label>Sunday</label></div>
                    <label>@</label> 
                    <input id="sunday-venue" type="text" name="sunday_venue" placeholder="Some Place"> 
                    <input id="sunday-starttime" class="time" type="text" name="sunday_starttime" placeholder="8:00 AM"> <label>-</label>
                    <input id="sunday-endtime" class="time"type="text" name="sunday_endtime" placeholder="9:00 AM">
                </div>

            </div>

            <button type="submit" class="pure-button pure-button-primary">Post</button>

        </fieldset>
    </form>
</div>
<% include footer %>

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